Paper feed



Feb. 20, 1945. J'. T. FERRY 2,369,729

PAPER FEED Filed Sept. 2, 1942l 2 Sheets-Sheet l 9 Q LL Q M N (tum f/ INVVENTOR .10H Nv n FERRY BYJyLLLL- ATTO R N EY Feb. v20, 1945. l .1.4 T. FERRY PAPER FEED 2 Sheets-Sheet 2 Filed Sept. 2, 1942 lINVENroR vloHN T. FERRY BY if@ ATTORNEY i Patented Feb. 2o, 194s PAPER FEED John T. Ferry, Ilion, N. Y., assgnor to Remingi ton Rand Inc., Buffalo, N. Y., a corporation o Delaware Application September?, 1942, Serial No. 456,989- 9 Claims. (Cl. 271-551) This invention relates to new and useful improvement in devices for feeding paper, and particularly to paper feed rolls and associated parts.

It is the main object of the invention to so form and constructlpaper feed rolls that fragments, bits, and chips, separated from the paper passing through the machine, will not collect on the rolls and tend thereby to impair the feed of the paper through the machine.

Broadly and generally stated the problem which has been solved by the present invention is (1) to provide means inherent in the feed rolls so that the chips" cannot adhere thereto, and (2) to construct the paper feed rolls so that fragments, bits and chips of paper coming into contact therewith will nothave a planar contact with the surface of the rolls, but only a point contact therewith. Therefore, "chips being charged with static electricity as they usually are, will not cling to the surface of the rolls as they do when there is a planar contact between the roller andthe chips The particular embodiment of the problem which confronted the applicant has to dorwizth card perforators in which cards are fed through the machines, to be punched or perforated in l various manners and in accordance with various codes to represent business data which would later be tabulated for statistical purposes. In this particular type of machine, the cards are fed from a hopper and'by rolls le'd into a chamber in which they are held while being punched or perforated. Upper and lower rolls engage the cards while they are in this chamber not only to feed them thereinto, but also to eject them from the chamber when they are released after being punched.

the

In the operation of the machine, after a card has been introduced into the card chamber and is positioned to be punched, the chamber with the card is moved upwardly in a manner to achieve the perforating of the cards, but at this step in the operation the lower feed rolls are leftl behind and are disposed below the chamber. As the card is perforated the chips or fragments punched therefrom willv fall down, and

. in actual previous practice and use they dropped onto the lower feedV rolls and, being charged statically with electricity, they had a very annoying tendency to stick to the rolls, especially along the sides thereof. It was found, therefore, that when, in the next operation' of the machine, the card chamber was lowered and the cards again brought into contact with the rolls, that the chips clinging thereto would tend to be fed 50 the feed rolls; and f up by the rolls into the card chamber to prevent the feed of the cards and also to impair the proper registration of the cards in the chamber. Since the feed of the cards into and out ofthe chamber and the registration ofthe ycard in the chamber are very important matters in the proper code punching ofthe cards, this disadvantage posed a very serious and important problem.

In studying 'this problem it was realized that when the chips separated from the paper being fed through themachine and came into contact with the ordinary flat surfaced rolls, the chips, being flat themselves, could and did have a planar contact withthe smooth surfaces thereof which enabled 'them better to lcling theretoandv v result in the above mentioned difficulties. It was then realized', after careful study, that if the surfaces of the rolls with which the chips"- might contact were provided with non-planar surfaces, the plane to plane contact couldnot result and the diiiiculties hitherto encountered.

would be overcome. Therefore, in accordance vwith my invention I provide the rolls with nonplanar surfacesso that any "chips which might contact the rollsand/or `associated parts 'can have only a point-to-point contact therewith and thus redirce to va minimum the chance of the chips" clinging to the rolls and their associated parts with the deleterious results previously mentioned.

In order to show a present preferredembodiment of my' invention, which, however, isl .only

one form which it may assume,v I have presented i several drawingsv illustrating the invention as applied toa particular formofcardA punch machine of the vwell known Powers type, of lwhich l an example 'may be Aseen in U. S.` Patent No.

2,044,707, issued June 16, 1936, to W. W.v Lasker. Further and more specific objects, features,.

and advantages will more clearly appear from a consideration of the following description, es-

pecially when read'in connection with the accompanying drawings, which illustrate a' present preferred embodiment of the invention, whereinl card pery Fig. 1 is a cross section throughva forator, showing the invention;

Fig. 2 is a view similarto Fig. l somewhat en-` larged showing a portion of the machine with the parts inthe position at which the cards are being perforated;

Fig. 3 is an enlarged 'detail side elevation of Fig. 4 is a cross section taken on the line 4--4 of Fig. 3.

In the specific form of embodiment illustrated in the drawings, the paper, in this case in the form in the magazine I0, and is fed seriatim through a preadjusted card throat II by a harmonically reciprocated card picker I2 to the pairs of rotating feed rolls I4 and |5, thence through feed rolls a and 20 into the card punching chamber I6. This chamber I6 consists vof a pair of matched perforated plates, the lower one I1 serving as a die, and the upper one I8 as a stripper plate and guide for the punches. The card A to be punched is temporarily held stationary in the punching chamber I6 by a pair of cam and spring controlled card stops I9 against the transporting action of the rotating feed rolls 20 and 20a. The

feed rolls I4, I5, and 20 are driven by a main shaft 22 through a suitable train of gearing in the well known manner.

The entire punching chamber I6, with the setl of punches 2| (one for every possible perforating position), the card and punch guide support, is given a reciprocatory motion for every rotation of the main shaft 22 by a suitably contoured box cam 23 fixed thereon, acting through a forked lever frame 24, which is pivoted near its midpoints on trunnions 25 on the main frame. Above the punches 2| is a set of pins or gags 26, one for each punch, which are .spring pressed upward and carried in a stationary frame. Mounted over the gags 26 is a plurality of set bars 21 having extrusions 28 thereon adapted to cooperate with locking slides 36.

Mounted in a carriage 3| is a set-bar basket, comprising a series of set-bar pins 32, which are connected by Bowden wires 33 to individual solenoids (not shown) controlled by contacts under the keys 34. The depression of a key 34 actuates a set pin 32, which in turn depresses a set-bar 21 over which it is positioned. The de pressed set-bar 21 is locked down by the locking slide 30, thus preventing its associated punch gag element 26 from rising when the punches are raised. During the upward movement of the punching chamber I6 and its frame, the selected punches 2| are held stationary relative to the main framework by the gags 26, and are thus forced through the card in the punching chamber at the location determined by the correspending holes in the matched perforated plate. The unselected punches are free to be raised by the card as shown in Fig. 2.

During the downward movement of the said parts, the punches 2| are arrested against continued downward movement by the fixed stripper plate 29 which is contacted by the heads of the descending punches 2|. The card stops I9 are Withdrawn and the feed rolls 20 and 20a, which are located at the extreme narrow margins of the punching chamber, feed the punched card to a pair of eject rolls 35 and thence to the storage receptacle 36.

The lower feed rolls 20 which,ras shown, constitute an improved element of the paper feeding device, are formed as shown in Figs. 3 and 4. In this improved form the outer peripheries of the rolls are roughened or knurled to form point contact surfaces, as indicated by the numeral 31, so as not to present much, if any, flat surface to which statically charged paper chips may cling. Likewise, the side faces of the rolls are also formed with radial ridges or teeth 38 which slope from the center outwardly, and break up the surface of the sides of the rolls into a plurality of line surfaces for the same The hub 39 of the rolls has also been pllTpOSe.

2,369,729 of cards A to be punched or perforoted, is stacked treated in a similar manner, the ridges increasing in depth from the face of the rolls 20 outward as shown.

Referring to Figs. 1 and 2, it will be noted that when the punch frame is at rest (Fig. 1) the feed rolls 20 and 20a extend through slots in the die plate I1 in a position to receive and feed the card A forward against the card stop However, when the card chamber and the accompanying punches 2| are raised to effect punching of the cards, as before explained (see Fig. 2), the lower rolls 20 do not rise, but continue to rotate, lying, as shown,-below the card frame and chamber I6. It is during the time that the rolls 26 are disposed below the card chamber I6 'that the chips punched out of the cards tend to drop down onto the rolls20, and being statically charged, tend to cling thereto, especially when the rolls present sizable at areas to which the chips can adhere. If this happens, then, when the punch chamber I6 is lowered to the position shown in Fig. 1 again, the chips thus clinging, sometimes whole strings of them, to the rolls, would be carried into the card chamber I6, and tend to clog the card chamber and impair the proper positioning of the card against the stop I9, which would affect the proper registration and, consequently, the proper perforation of the card.

However, it is apparent that when the improved form of rolls 20 is used this adhesion of the chips to the rolls is practically eliminated and, therefore, the above mentioned disadvantageous results are avoided. In the improved rolls when the chips drop onto the rolls they nd no planar contacts since practically the entire surface of the feed elements, including the rolls and their hubs, is formed with a large number of ridges and corrugated areas which present to the chips nothing but line or point contacts which efficiently prevents any adhesion.

As most all the parts in machines of this type are provided with a slight coating of oil, it is possible that the oil may increase the possibilities of adhesion even more than that caused by the static charges on the paper chips. With the present construction the ridges formed on the peripheries and sides of the rolls will not only form point contact surfaces but also cause an air current which will more readily dislodge the paper fragments than if the peripheries and sides were smooth.

It is obvious that the use of rolls of this improved form is not limited to the instant use or type of machine, but may find utility in any place where chipa dust, lint, or other substances, subject to frictional static charges, are liable to adhere to a flat surface, such as that on printing press rolls, etc.

The invention'has herein been described in detail and with respect to a present preferred form thereof, but is not to be limited to such details and forms, since many changes and modifications may be made in the invention without departing from the spirit and scope of the invention in its lbroadest aspects.

What I claim as new and desire to secure as Letters Patent is:

l. In a card punching device having paper feed hubbed rolls, the surfaces of the rolls and the hubsvbeing provided with ridges t0 prevent the paper fragments from clinging to the rolls and the hubs.

2. In a card punching device having paper feed rolls, the side surfaces of the rolls being provided 'withradial ridges to prevent paper fragments from clinging to the rolls.

3. In a card punching' device having paper feed rolls, the side surfaces of the rolls being provided' f with radial ridges and the periphery of the rolls being knurled to prevent paper fragments from clinging to the rolls.

4. In a card punching device having paper feed rollsl with hubs, the side surfacesof the rollsv being provided with radial ridges. the peripheries of the rolls being; knurled and the'hubs having longitudinal ridges thereon increasing in depthfrom the rollers outwardly, the knurling and the ridges being provided to prevent paper fragments .from clinging to the rolls.

5. In a device for punching cards having a vchamber through which the paperis f ed, feed rolls extending into said chamber to engage and feed the paper, means for lifting said chamber above the rolls during the operation .of the deber above the rolls during the operation of the device, the rolls being provided with lateral radial ridges and the hubs being provided with longitudinal ridges to prevent paper fragments falling out of the chamber from clinging to the rolls. y

7. In a device for punching cardshaving a chamber through which the paper is fed, hubbed feed rolls extending into. said chamber to engage and feed `the paper, means for lifting said chamber above the rolls during the operation of the device, the rolls being provided with peripheral and lateral ridges and the hubs being provided with longitudinal -ridges'increasing in depth outwardly from theI rolls to prevent paper fragments 

